Cisco 7965 Stuck at Upgrading Screen

I ran into this issue after factory resetting a Cisco 7965 phones  resulting in it being stuck at the upgrading screen while displaying the MAC address on the bottom left.

Here are a few things that should be checked to resolve this:
DHCP ip helper-address
Phone Load
DHCP Scope

Cisco Unity Express Compatibility Matrix

The following link shows the compatibility of Cisco Unity Express with CUCME, CUCM and Routers:
http://www.cisco.com/en/US/docs/voice_ip_comm/unity_exp/compatibility/cuecomp.htm

This can be used when integrating CUE with CUCM, as an example.

Creating Custom Backgroud Images for IP Phones

The following link explains the process for creating custom background images for Cisco IP phones:
http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/7965g_7945g/6_1_3/english/administration/guide/7965cst.html#wp1088046

Hardware Restting a 7900 Series Phone

1. Unplug the power cable from the phone and then plug it back in. The phone begins its power up cycle.
2. While the phone is powering up, and before the Speaker button flashes on and off, press and hold #. Continue to hold # until each line button flashes on and off in sequence in amber.
3. Release # and press 123456789*0#.

ePhone slot is already registered with 00f0.0000.0000

When trying to remove a phone from Communication Manager Express (CME) to receive the following error: ePhone slot is already registered with 00f0.0000.0000

Steps to resolve and remove the phone:
1. Unplug the phone
2. Remove the ephone 1
3. Type, clear ip dhcp bindings
4. Re-create the ephone 1
5. Define the mac-address of the phone
6. Now plug back in the phone.

CUCM Conference Setting Best Practice

It is best practice when configuring CUCM and conferencing that you change the default conference drop setting to "When Conference Controller Leaves".

System > Service Parameters > Select you Publisher > Select "Cisco CallManager" > Search for "Clusterwide Parameters (Feature - Conference)" > Drop Ad Hoc Conference

This setting will drop the conference call when the conference initiator hands up the call. This option will assist in preventing call fraud.

The default option is net to "Never".